CN105552930A - Distribution transform reactive compensation method and device - Google Patents
Distribution transform reactive compensation method and device Download PDFInfo
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- CN105552930A CN105552930A CN201610145272.XA CN201610145272A CN105552930A CN 105552930 A CN105552930 A CN 105552930A CN 201610145272 A CN201610145272 A CN 201610145272A CN 105552930 A CN105552930 A CN 105552930A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The embodiment of the invention provides a distribution transform reactive compensation method and device. A power side sampling current transformer acquires the power side current of a 380 V power supply in real time, a dynamic reactive compensation equipment output current sampling instrument transformer acquires the output current of dynamic reactive compensation equipment in real time, and both the output end of the power side sampling current transformer and the output end of the dynamic reactive compensation equipment output current sampling instrument transformer are connected with the input end of a static compensation controller and the input end of a dynamic compensation controller; the 380 V power supply is connected with a 380 V bus through a linked switch; both static reactive compensation equipment and dynamic reactive compensation equipment are connected with the 380 V bus; the output end of the static compensation controller is connected with the static reactive compensation equipment; the output end of the dynamic compensation controller is connected with the dynamic compensation control equipment. By the adoption of the method and device, automatic tracking compensation can be achieved. The method and device have the advantages that response speed is high, compensation is continuous, loss is low, manufacturing cost is low, and implementation is easy and convenient.
Description
Technical field
The present invention relates to reactive power compensation technology field, particularly relate to a kind of distribution transforming reactive-load compensation method and device.
Background technology
Reactive power compensation, as the important measures keeping balance of imaginary power of power system, reduce network loss, improve power supply quality, has been widely used in each electric pressure electrical network.Choose reasonable reactive power compensation, can effectively maintain system voltage level, improve voltage stability, avoid long-distance transmissions idle in a large number, thus reduction active power loss, reduce generating expense, improve utilization rate of equipment and installations, the Appropriate application of reactive power compensation is the important topic that electric power enterprise improves economic and social benefit.
At present, the compensation technique that distribution transformer is conventional is mainly two kinds: dynamic passive compensation and static reactive power compensation.Dynamic passive compensation is the compensation way based on power electronic technology, general principle is: will from commutation bridge circuit directly or be connected in parallel on electrical network by reactor, by suitably regulating phase place and the amplitude of bridge circuit AC output voltage, or directly control its ac-side current, just this circuit can be made to absorb or send the reactive current met the demands, realize the object of reactive power compensation.The general principle of static compensation is: by Capacitor banks, is connected in parallel on electrical network by fling-cut switch, according to the conversion of System Reactive Power, drops into different group numbers, realizes System Reactive Power grading compensation.
Wherein, the shortcoming of dynamic passive compensation is: equipment manufacturing cost is high, own loss is large, and the shortcoming of static reactive power compensation is; Response speed is slow, it is discontinuous to compensate, compensation effect is poor.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of distribution transforming reactive-load compensation method and device, uses that dynamic passive compensation equipment manufacturing cost is high, own loss is large, use static reactive power compensation response speed slow to solve in prior art, compensate discontinuous, the problem of compensation effect difference.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
A kind of distribution transforming reactive power compensator, comprising: the sampling of dynamic passive compensation equipment output current instrument transformer, Static Compensation Control device and the dynamic compensation controller of dynamic passive compensation equipment output current described in the mains side sampling current transformer of 380V power electric source electric current described in the 380V power supply that distribution transformer provides, Real-time Collection, connecting valve, 380V bus, static reactive power compensation equipment, dynamic passive compensation equipment, Real-time Collection; Wherein,
The output of the output of described mains side sampling current transformer and described dynamic passive compensation equipment output current sampling instrument transformer, is all connected with described dynamic compensation controller input with described Static Compensation Control device input;
Described 380V power supply is connected with described 380V bus by described connecting valve;
Described static reactive power compensation equipment is all connected with described 380V bus with described dynamic passive compensation equipment;
Described Static Compensation Control device output is connected with described static reactive power compensation equipment;
Described dynamic compensation controller output is connected with described dynamic compesated control equipment.
Wherein, described static reactive power compensation equipment comprises: three terminal bidirectional alternating-current switch and Capacitor banks, and described 380V bus, three terminal bidirectional alternating-current switch and Capacitor banks are sequentially connected in series.
Wherein, described Capacitor banks is single delta connection Capacitor banks or star-star connection Capacitor banks.
Wherein, described dynamic compesated control equipment comprises: linked reactor and static reacance generator, and the described sampling of dynamic passive compensation equipment output current instrument transformer, linked reactor and static reacance generator are sequentially connected in series.
Wherein, described linked reactor comprises: resistance and roof-cut resistence, and described resistance and described roof-cut resistence are connected in parallel.
Wherein, described static reacance generator comprises: the IGBT of band anti-parallel diodes and Support Capacitor, IGBT and the described Support Capacitor of described band anti-parallel diodes are connected in parallel.
Wherein, described distribution transforming reactive power compensator also comprises: circuit breaker, second end of described mains side sampling current transformer is connected with described 380V bus by described circuit breaker, second end of described dynamic passive compensation equipment output current sampling instrument transformer is connected with described dynamic passive compensation equipment by described circuit breaker, and described static reactive power compensation equipment is connected with described 380V bus by described circuit breaker.
Wherein, described distribution transforming reactive power compensator also comprises: lightning arrester, and the first end of described lightning arrester is connected with described 380V bus, the second end ground connection.
Wherein, described distribution transforming reactive power compensator also comprises: the casing holding described 380V bus, static reactive power compensation equipment, dynamic passive compensation equipment, the sampling of dynamic passive compensation equipment output current instrument transformer, Static Compensation Control device and dynamic compensation controller.
A kind of distribution transforming reactive-load compensation method, based on above-mentioned distribution transforming reactive power compensator, comprising:
The mains side electric current of 380V power supply described in mains side sampling current transformer Real-time Collection, and the described mains side electric current gathered is inputted Static Compensation Control device and dynamic compensation controller;
The output current of dynamic passive compensation equipment output current sampling instrument transformer Real-time Collection dynamic passive compensation equipment, and the described output current gathered is inputted Static Compensation Control device and dynamic compensation controller;
Described Static Compensation Control device calculates the numerical value of distribution transformer parameter preset according to described mains side electric current and described output current, obtain the first numerical value, if described first numerical value meets pre-conditioned, then described Static Compensation Control device controls described static reactive power compensation equipment and carries out static reactive power compensation;
Described dynamic compensation controller calculates the numerical value of distribution transformer parameter preset according to described mains side electric current and described output current, obtain second value, if described second value meets pre-conditioned, then described dynamic compensation controller controls described dynamic passive compensation equipment and carries out dynamic passive compensation.
Based on technique scheme, the distribution transforming reactive-load compensation method that the embodiment of the present invention provides and device, wherein, device comprises: the 380V power supply that distribution transformer provides, the mains side sampling current transformer of 380V power electric source electric current described in Real-time Collection, connecting valve, 380V bus, static reactive power compensation equipment, dynamic passive compensation equipment, the dynamic passive compensation equipment output current sampling instrument transformer of Real-time Collection dynamic passive compensation equipment output current, Static Compensation Control device and dynamic compensation controller, the output of mains side sampling current transformer is connected with dynamic compensation controller input with Static Compensation Control device input, the output of dynamic passive compensation equipment output current sampling instrument transformer is connected with dynamic compensation controller input with Static Compensation Control device input, 380V power supply is connected with 380V bus by connecting valve, static reactive power compensation equipment is all connected with 380V bus with dynamic passive compensation equipment, Static Compensation Control device output is connected with static reactive power compensation equipment, dynamic compensation controller output is connected with described dynamic compesated control equipment.When this distribution transforming reactive power compensator carries out work, by the mains side electric current of mains side sampling current transformer Real-time Collection 380V power supply, and the mains side electric current gathered is inputted Static Compensation Control device and dynamic compensation controller, the output current of dynamic passive compensation equipment is gathered by dynamic passive compensation equipment output current real-time sampling instrument transformer, and the output current gathered is inputted Static Compensation Control device and dynamic compensation controller, Static Compensation Control device is after the output current of the dynamic passive compensation equipment of the mains side electric current and the transmission of dynamic passive compensation equipment output current real-time sampling instrument transformer that receive the transmission of mains side sampling current transformer, the numerical value of distribution transformer parameter preset will be calculated according to this mains side electric current and this output current, obtain the first numerical value, when determining that this first numerical value meets pre-conditioned, control static reactive power compensation equipment and carry out static reactive power compensation, simultaneously, dynamic compensation controller is after the output current of the dynamic passive compensation equipment of the mains side electric current and the transmission of dynamic passive compensation equipment output current real-time sampling instrument transformer that receive the transmission of mains side sampling current transformer, also the numerical value of distribution transformer parameter preset will be calculated according to this mains side electric current and this output current, obtain second value, when determining that this second value meets pre-conditioned, control dynamic passive compensation equipment and carry out dynamic passive compensation.The distribution transforming reactive power compensator that the embodiment of the present invention provides, can automatic tracking and compensating, and have response speed very fast, compensate continuously, loss is less, cost is lower, implement the advantages such as comparatively simple and convenient.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The connection diagram of the distribution transforming reactive power compensator that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The connection diagram of the distribution transforming reactive power compensator that Fig. 1 provides for the embodiment of the present invention, can automatic tracking and compensating, and have response speed very fast, compensate continuously, loss is less, cost is lower, implement the advantages such as comparatively simple and convenient; With reference to Fig. 1, this distribution transforming reactive power compensator can comprise: the sampling of 380V power supply 1, mains side sampling current transformer 2, connecting valve 9,380V bus 3, dynamic passive compensation equipment output current instrument transformer 4, static reactive power compensation equipment 5, dynamic passive compensation equipment 6, Static Compensation Control device 7 and dynamic compensation controller 8; Wherein,
380V power supply 1 is provided by distribution transformer.Mains side sampling current transformer 2 is installed on the outlet of distribution transformer low-pressure side, and its output is connected with the input of dynamic compensation controller 8 with the input of Static Compensation Control device 7.When the distribution transforming reactive power compensator that the embodiment of the present invention provides carries out work, mains side sampling current transformer 2 Real-time Collection mains side electric current, and after collection mains side electric current, this mains side electric current gathered is inputted in Static Compensation Control device 7 and dynamic compensation controller 8.
The dynamic passive compensation equipment output current sampling output of instrument transformer 4 is connected with the input of dynamic compensation controller 8 with the input of Static Compensation Control device 7.When the distribution transforming reactive power compensator that the embodiment of the present invention provides carries out work, the output current of dynamic passive compensation equipment output current sampling instrument transformer 4 Real-time Collection dynamic passive compensation equipment 6, and the output current of the dynamic passive compensation equipment 6 gathered is inputted in Static Compensation Control device 7 and dynamic compensation controller 8.
Wherein, it should be noted that the installation direction of mains side current transformer 2 is P1 and enters P2 and go out, the installation direction of dynamic passive compensation equipment output current sampling instrument transformer 4 is that P2 enters PI and goes out.
380V power supply 1 is connected with 380V bus 3 by connecting valve 9.When needing the distribution transforming reactive power compensator using the embodiment of the present invention to provide, by connecting valve 9 is closed, power to 380V bus 3 and each equipment of being connected with 380V bus 3, when needing the distribution transforming reactive power compensator stopping using the embodiment of the present invention to provide, then by disconnecting switch 9, the each device powers down making 380V bus 3 and be connected with 380V bus 3, controls each 380V bus 3 and each equipment of being connected with 380V bus 3 stops carrying out work.
Static reactive power compensation equipment 5 is connected with 380V bus, and the output of Static Compensation Control device 7 is connected with static reactive power compensation equipment 5.When the distribution transforming reactive power compensator that the embodiment of the present invention provides carries out work, Static Compensation Control device 7 is after the output current of the dynamic passive compensation equipment 6 of the mains side electric current and the transmission of dynamic passive compensation equipment output current real-time sampling instrument transformer 4 that receive mains side sampling current transformer 2 transmission, the numerical value of distribution transformer parameter preset will be calculated according to this mains side electric current and this output current, the such as numerical value of distribution transformer capacity of idle power, obtain the first numerical value, and when determining that this first numerical value meets pre-conditioned, control static reactive power compensation equipment 5 and carry out static reactive power compensation.
Dynamic passive compensation equipment 6 is connected with 380V bus, and the output of dynamic compensation controller 8 is connected with dynamic compesated control equipment 6.When the distribution transforming reactive power compensator that the embodiment of the present invention provides carries out work, dynamic compensation controller 8 is after the output current of the dynamic passive compensation equipment 6 of the mains side electric current and the transmission of dynamic passive compensation equipment output current real-time sampling instrument transformer 4 that receive mains side sampling current transformer 2 transmission, the numerical value of distribution transformer parameter preset will be calculated according to this mains side electric current and this output current, obtain second value, if this second value meets pre-conditioned, control dynamic passive compensation equipment 6 and carry out dynamic passive compensation.
Optionally, the capacity of required reactive-load compensation equipment first can be calculated according to the capacity of distribution transformer, then according to the ratio preset, the preset ratio of such as 1:2, pro rata distributes to the capacity of dynamic passive compensation equipment 6 and static reactive power compensation equipment 5.
Based on technique scheme, the distribution transforming reactive-load compensation method that the embodiment of the present invention provides and device, wherein, device comprises: the 380V power supply that distribution transformer provides, the mains side sampling current transformer of 380V power electric source electric current described in Real-time Collection, connecting valve, 380V bus, static reactive power compensation equipment, dynamic passive compensation equipment, the dynamic passive compensation equipment output current sampling instrument transformer of Real-time Collection dynamic passive compensation equipment output current, Static Compensation Control device and dynamic compensation controller, the output of mains side sampling current transformer is connected with dynamic compensation controller input with Static Compensation Control device input, the output of dynamic passive compensation equipment output current sampling instrument transformer is connected with dynamic compensation controller input with Static Compensation Control device input, 380V power supply is connected with 380V bus by connecting valve, static reactive power compensation equipment is all connected with 380V bus with dynamic passive compensation equipment, Static Compensation Control device output is connected with static reactive power compensation equipment, dynamic compensation controller output is connected with described dynamic compesated control equipment.When this distribution transforming reactive power compensator carries out work, by the mains side electric current of mains side sampling current transformer Real-time Collection 380V power supply, and the mains side electric current gathered is inputted Static Compensation Control device and dynamic compensation controller, the output current of dynamic passive compensation equipment is gathered by dynamic passive compensation equipment output current real-time sampling instrument transformer, and the output current gathered is inputted Static Compensation Control device and dynamic compensation controller, Static Compensation Control device is after the output current of the dynamic passive compensation equipment of the mains side electric current and the transmission of dynamic passive compensation equipment output current real-time sampling instrument transformer that receive the transmission of mains side sampling current transformer, the numerical value of distribution transformer parameter preset will be calculated according to this mains side electric current and this output current, obtain the first numerical value, when determining that this first numerical value meets pre-conditioned, control static reactive power compensation equipment and carry out static reactive power compensation, simultaneously, dynamic compensation controller is after the output current of the dynamic passive compensation equipment of the mains side electric current and the transmission of dynamic passive compensation equipment output current real-time sampling instrument transformer that receive the transmission of mains side sampling current transformer, also the numerical value of distribution transformer parameter preset will be calculated according to this mains side electric current and this output current, obtain second value, when determining that this second value meets pre-conditioned, control dynamic passive compensation equipment and carry out dynamic passive compensation.The distribution transforming reactive-load compensation method that the embodiment of the present invention provides and device, can automatic tracking and compensating, and have response speed very fast, compensate continuously, loss is less, cost is lower, implement the advantages such as comparatively simple and convenient.
Optionally, with reference to Fig. 1, the connection diagram of the distribution transforming reactive power compensator that the embodiment of the present invention provides, in this distribution transforming reactive power compensator, static reactive power compensation equipment 5 can comprise: three terminal bidirectional alternating-current switch 51 and Capacitor banks 52.
The first end of three terminal bidirectional alternating-current switch 51 is connected with 380V bus 3, and the second end is connected with Capacitor banks 52.
Optionally, Static Compensation Control device 7 closes and controls static reactive power compensation equipment 5 by controlling three terminal bidirectional alternating-current switch 51 and carry out static reactive power compensation, disconnects and controls static reactive power compensation equipment 5 by controlling three terminal bidirectional alternating-current switch 51 and stop carrying out static reactive power compensation.
Optionally, Capacitor banks 52 can be single delta connection Capacitor banks, also can be star-star connection Capacitor banks.
Optionally, Capacitor banks 52 can also comprise indicator light, and by arbitrary Capacitance parallel connection in this indicator light and Capacitor banks 52, whether the static reactive power compensation equipment 5 being used to indicate Capacitor banks 52 place comprising this indicator light carries out static reactive power compensation.If indicator light is bright, then illustrate that the static reactive power compensation equipment 5 comprising Capacitor banks 52 place of this indicator light carries out static reactive power compensation, otherwise, if indicator light is not bright, then illustrate that the static reactive power compensation equipment 5 comprising Capacitor banks 52 place of this indicator light does not carry out static reactive power compensation.
Optionally, with reference to Fig. 1, the connection diagram of the distribution transforming reactive power compensator that the embodiment of the present invention provides, dynamic compesated control equipment 6 can comprise: linked reactor 61 and static reacance generator 62.
The first end of linked reactor 61 is connected with 380V bus 3, and the second end is connected with static reacance generator 62.
Optionally, with reference to Fig. 1, linked reactor 61 can comprise: resistance and roof-cut resistence, and this resistance and roof-cut resistence are connected in parallel.Static reacance generator can comprise IGBT and the Support Capacitor of band anti-parallel diodes, and IGBT and this Support Capacitor of this band anti-parallel diodes are connected in parallel.When this roof-cut resistence disconnects, this Support Capacitor charges, and when this roof-cut resistence closes, this Support Capacitor is that the IGBT of this band anti-parallel diodes carries out power supply support.
Optionally, dynamic compensation controller 8 controls dynamic passive compensation equipment 6 by the IGBT conducting of control cincture anti-parallel diodes and carries out dynamic passive compensation, and the IGBT by control cincture anti-parallel diodes cuts off and controls dynamic passive compensation equipment 6 and stop carrying out dynamic passive compensation.
Optionally, with reference to Fig. 1, the connection diagram of the distribution transforming reactive power compensator that the embodiment of the present invention provides, the distribution transforming reactive power compensator that the embodiment of the present invention provides can also comprise: circuit breaker 10 and/or lightning arrester 11.
Be connected with 380V bus 3 by circuit breaker 10 by dynamic passive compensation equipment 6, static reactive power compensation equipment 5 is connected with 380V bus 3 by circuit breaker 10; The first end of lightning arrester 11 is connected 3 with 380V bus, the second end ground connection of lightning arrester 11.The distribution transforming reactive power compensator provided by circuit breaker 10 and lightning arrester 11 pairs of embodiment of the present invention is protected.
Optionally, the distribution transforming reactive power compensator that the embodiment of the present invention provides can also comprise casing, and in the distribution transforming reactive power compensator embodiment of the present invention provided, 380V bus, static reactive power compensation equipment, dynamic passive compensation equipment, the sampling of dynamic passive compensation equipment output current instrument transformer, Static Compensation Control device and dynamic compensation controller are all contained in this casing.
The distribution transforming reactive power compensator that the embodiment of the present invention provides, can automatic tracking and compensating, and have response speed very fast, compensate continuously, loss is less, cost is lower, implement the advantages such as comparatively simple and convenient.
Below to the distribution transforming reactive-load compensation method introduction that the embodiment of the present invention provides, distribution transforming reactive-load compensation method described below is based on above-described distribution transforming reactive power compensator, this distribution transforming reactive-load compensation method can be applicable to this distribution transforming reactive power compensator, realizes distribution transforming reactive power compensation.
Step S100: the mains side electric current of 380V power supply described in mains side sampling current transformer Real-time Collection, and the described mains side electric current gathered is inputted Static Compensation Control device and dynamic compensation controller;
When the distribution transforming reactive power compensator that the embodiment of the present invention provides carries out work, mains side sampling current transformer is by Real-time Collection mains side electric current, and after collecting mains side electric current, the mains side electric current gathered is inputted in Static Compensation Control device and dynamic compensation controller.
Step S110: the output current of dynamic passive compensation equipment output current sampling instrument transformer Real-time Collection dynamic passive compensation equipment, and the described output current gathered is inputted Static Compensation Control device and dynamic compensation controller;
Accordingly, when the distribution transforming reactive power compensator that the embodiment of the present invention provides carries out work, dynamic passive compensation equipment output current sampling instrument transformer is also by the output current of Real-time Collection dynamic passive compensation equipment, and after the output current collecting dynamic passive compensation equipment, the output current of the dynamic passive compensation equipment gathered is inputted in Static Compensation Control device and dynamic compensation controller.
Wherein, it should be noted that step S100 and step S110 there is no actuating logic ordinal relation, can first perform step S100 and perform step S110 again, also can first perform step S110 and perform step S100 again, also can perform step S100 and step S110 simultaneously.
Step S120: described Static Compensation Control device calculates the numerical value of distribution transformer parameter preset according to described mains side electric current and described output current, obtain the first numerical value, if described first numerical value meets pre-conditioned, then described Static Compensation Control device controls described static reactive power compensation equipment and carries out static reactive power compensation;
When the distribution transforming reactive power compensator that the embodiment of the present invention provides carries out work, Static Compensation Control device is after the output current of the dynamic passive compensation equipment of the mains side electric current and the transmission of dynamic passive compensation equipment output current real-time sampling instrument transformer that receive the transmission of mains side sampling current transformer, the numerical value of distribution transformer parameter preset will be calculated according to this mains side electric current and this output current, the numerical value of such as Reactive Power in Distributing Transformer, obtain the first numerical value, and when determining that this first numerical value meets pre-conditioned, control static reactive power compensation equipment and carry out static reactive power compensation.
Optionally, Static Compensation Control device closes and controls static reactive power compensation equipment by controlling three terminal bidirectional alternating-current switch and carry out static reactive power compensation, contrary, Static Compensation Control device controls static reactive power compensation equipment by the disconnection of control three terminal bidirectional alternating-current switch to be stopped carrying out static reactive power compensation.
Step S130: described dynamic compensation controller calculates the numerical value of distribution transformer parameter preset according to described mains side electric current and described output current, obtain second value, if described second value meets pre-conditioned, then described dynamic compensation controller controls described dynamic passive compensation equipment and carries out dynamic passive compensation.
Accordingly, when the distribution transforming reactive power compensator that the embodiment of the present invention provides carries out work, dynamic compensation controller is after the output current of the dynamic passive compensation equipment of the mains side electric current and the transmission of dynamic passive compensation equipment output current real-time sampling instrument transformer that receive the transmission of mains side sampling current transformer, also the numerical value of distribution transformer parameter preset will be calculated according to this mains side electric current and this output current, obtain second value, if this second value meets pre-conditioned, control dynamic passive compensation equipment and carry out dynamic passive compensation.
Optionally, dynamic compensation controller controls dynamic passive compensation equipment by the IGBT conducting of control cincture anti-parallel diodes and carries out dynamic passive compensation, contrary, dynamic compensation controller cuts off by the IGBT of control cincture anti-parallel diodes and controls dynamic passive compensation equipment and stop carrying out dynamic passive compensation.
Wherein, it should be noted that and also there is no actuating logic ordinal relation between step S120 and step S130, can first perform step S120 and perform step S130 again, also can first perform step S130 and perform step S120 again, also can perform step S120 and step S130 simultaneously.
The distribution transforming reactive-load compensation method that the embodiment of the present invention provides, can automatic tracking and compensating, and have response speed very fast, compensate continuously, loss is less, cost is lower, implement the advantages such as comparatively simple and convenient.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For method disclosed in embodiment, because it is corresponding with device disclosed in embodiment, so description is fairly simple, relevant part illustrates see method part.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a distribution transforming reactive power compensator, it is characterized in that, comprising: the sampling of dynamic passive compensation equipment output current instrument transformer, Static Compensation Control device and the dynamic compensation controller of dynamic passive compensation equipment output current described in the mains side sampling current transformer of 380V power electric source electric current described in the 380V power supply that distribution transformer provides, Real-time Collection, connecting valve, 380V bus, static reactive power compensation equipment, dynamic passive compensation equipment, Real-time Collection; Wherein,
The output of the output of described mains side sampling current transformer and described dynamic passive compensation equipment output current sampling instrument transformer, is all connected with described dynamic compensation controller input with described Static Compensation Control device input;
Described 380V power supply is connected with described 380V bus by described connecting valve;
Described static reactive power compensation equipment is all connected with described 380V bus with described dynamic passive compensation equipment;
Described Static Compensation Control device output is connected with described static reactive power compensation equipment;
Described dynamic compensation controller output is connected with described dynamic compesated control equipment.
2. distribution transforming reactive power compensator according to claim 1, is characterized in that, described static reactive power compensation equipment comprises: three terminal bidirectional alternating-current switch and Capacitor banks, and described 380V bus, three terminal bidirectional alternating-current switch and Capacitor banks are sequentially connected in series.
3. distribution transforming reactive power compensator according to claim 2, is characterized in that, described Capacitor banks is single delta connection Capacitor banks or star-star connection Capacitor banks.
4. distribution transforming reactive power compensator according to claim 1, it is characterized in that, described dynamic compesated control equipment comprises: linked reactor and static reacance generator, and the first end of described linked reactor is connected with described 380V bus, and the second end connects with described static reacance generator.
5. distribution transforming reactive power compensator according to claim 4, is characterized in that, described linked reactor comprises: resistance and roof-cut resistence, and described resistance and described roof-cut resistence are connected in parallel.
6. distribution transforming reactive power compensator according to claim 5, is characterized in that, described static reacance generator comprises: the IGBT of band anti-parallel diodes and Support Capacitor, IGBT and the described Support Capacitor of described band anti-parallel diodes are connected in parallel.
7. the distribution transforming reactive power compensator according to any one of claim 1-6, it is characterized in that, also comprise: circuit breaker, described dynamic passive compensation equipment is connected with described 380V bus by described circuit breaker, and described static reactive power compensation equipment is connected with described 380V bus by described circuit breaker.
8. the distribution transforming reactive power compensator according to any one of claim 1-6, is characterized in that, also comprise: lightning arrester, and the first end of described lightning arrester is connected with described 380V bus, the second end ground connection.
9. the distribution transforming reactive power compensator according to any one of claim 1-6, it is characterized in that, also comprise: the casing holding described 380V bus, static reactive power compensation equipment, dynamic passive compensation equipment, the sampling of dynamic passive compensation equipment output current instrument transformer, Static Compensation Control device and dynamic compensation controller.
10. a distribution transforming reactive-load compensation method, is characterized in that, based on the distribution transforming reactive power compensator described in any one of claim 1-9, comprising:
The mains side electric current of 380V power supply described in mains side sampling current transformer Real-time Collection, and the described mains side electric current gathered is inputted Static Compensation Control device and dynamic compensation controller;
The output current of dynamic passive compensation equipment output current sampling instrument transformer Real-time Collection dynamic passive compensation equipment, and the described output current gathered is inputted Static Compensation Control device and dynamic compensation controller;
Described Static Compensation Control device calculates the numerical value of distribution transformer parameter preset according to described mains side electric current and described output current, obtain the first numerical value, if described first numerical value meets pre-conditioned, then described Static Compensation Control device controls described static reactive power compensation equipment and carries out static reactive power compensation;
Described dynamic compensation controller calculates the numerical value of distribution transformer parameter preset according to described mains side electric current and described output current, obtain second value, if described second value meets pre-conditioned, then described dynamic compensation controller controls described dynamic passive compensation equipment and carries out dynamic passive compensation.
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| CN109713683A (en) * | 2019-03-06 | 2019-05-03 | 黄河勘测规划设计研究院有限公司 | Low-voltage dual power power supply system reactive compensation configuration method |
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| CN109713683A (en) * | 2019-03-06 | 2019-05-03 | 黄河勘测规划设计研究院有限公司 | Low-voltage dual power power supply system reactive compensation configuration method |
| CN109713683B (en) * | 2019-03-06 | 2022-07-22 | 黄河勘测规划设计研究院有限公司 | Reactive compensation configuration method for low-voltage dual-power supply system |
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